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Jonathan Harris

Interleaving Spurs: Letís Look at the Math

Jonathan Harris
jonharris0
jonharris0
9/30/2013 8:02:58 PM
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Blogger
Re: Re : Interleaving Spurs: Letís Look at the Math
That is correct Sunita.  Now that we've explored the mismatches, I thought it appropriate to start quantifying the level of the spurs caused by these mismatches.

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SunitaT0
SunitaT0
9/30/2013 4:55:22 PM
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Master
Re : Interleaving Spurs: Letís Look at the Math
There are several challenges to look out for while interleaving ADCs.  Spurs appear in the output band that outcomes from the inadequacies related with inter leaving ADCs.  The deficiencies are essentially misalliances between the 2 ADCs that are interleaved.  There are 4 elementary misalliances that outcome in spurs in the production of band.  These are gain mismatch, offset mismatch bandwidth mismatch and timing mismatch.

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More Blogs from Jonathan Harris
We begin this series of blogs by taking a look at ADIsimADC, which is a quite relevant design tool for Jonathan Harris, an applications engineer in ADI's high-speed ADC group.
In this blog weíll take this one step further and look at driving the ADC power supplies directly from a DC/DC converter.
Previously in this blog series we looked at using a DC/DC converter (switching regulator) in combination with an LDO to drive the power supply inputs to an ADC. What we found was that using the DC/DC converter to step down the input voltage for the LDO was a much more efficient way to drive the power supply inputs to an ADC.
We look at using a DC/DC converter along with an LDO to drive the ADC power supply inputs.
I thought it would be good to continue looking at the example I gave in my last blog where we looked using fewer LDOs and combining power supply rails on an ADC while maintaining isolation with ferrite beads.
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